llvm-project/clang/test/CodeGen/PR15826.c

// RUN: %clang_cc1 -verify -emit-llvm-only %s -o %t

/* Testcase for PR15826 - clang hits assert in clang::ASTContext::getASTRecordLayout */
struct sysctl_req {
  struct aiocblist *p_aio;
};

struct sysctl_oid {
  int (*oid_handler)(struct sysctl_req *req);
};

static struct sysctl_oid sysctl___kern_features_aio;

static void const *const __set_sysctl_set_sym_sysctl___kern_features_aio
    __attribute__((__used__)) = &sysctl___kern_features_aio;

struct aiocblist {
  struct aiocb uaiocb; // expected-error {{field has incomplete type}} expected-note {{forward declaration}}
};